Direct temporal characterization of sub-3-fs deep UV pulses generated by resonant dispersive wave emission

• DOI: 10.1364/oe.494879
• Publication Date: 2023-07-21T09:00:17Z
• Authors: M. Reduzzi; M. Pini; L. Mai; F. Cappenberg; L. Colaizzi; F. Vismarra; A. Crego; M. Lucchini; C. Brahms; J. C. Travers; R. Borrego-Varillas; M. Nisoli
• Keywords: Ultraviolet; Characterization; Pulse duration

We report on the complete temporal characterization of ultrashort pulses, generated by resonant dispersive wave emission in gas-filled hollow-capillary fibers, with energy microjoule range and continuously tunable from deep-ultraviolet to ultraviolet. Temporal such ultrabroad particularly challenging this spectral region, was performed using an all-in-vacuum setup for self-diffraction frequency resolved optical gating (SD-FROG). Sub-3-fs pulses were measured, 250 nm 350 nm, a minimum pulse duration 2.4 ± 0.1 fs.